off nipple shield

Alejandra • Baby Boy Thiago was born September 23, 2016💙
My lo is currently 7 weeks, and I've b en using a nipple shield since birth. Recently it's been hurting while he feeds and when his done I notice blisters from the nipple shield, like his sucking to hard. So just yesterday I decided to try without the shield and he latch. His latched currently but omg it hurts so bad! Is this normal?